Hello Dear I appreciate your concern for your father I would like further information to help you better what all symptoms he is having since how long he is ill? Any associated co morbidity if any like diabetes or thyroid disease You need to consult a cardiologist for further examination and other alternative treatment Meanwhile I would advise certain life style modifications for better quality of life 1. Complete abstinence smoking and alcohol 2. Keep his blood pressure under check 3. Blood thinner medicines are there which reduces the risk of heart attack in future 4. Ask him not to exert much, aerobic exercises like walking and yoga recommended 5. Strict dietary restrictions as advised or you can ask me for that too Myself from Mumbai and there are numerous good cardiac care centers in Mumbai Hope you will find it relevant to your query Best wishes